When Emacs first visits an Org file, the global state is set to OVERVIEW,
i.e., only the top level headlines are visible7. This can be configured through the variable
org-startup-folded, or on a per-file basis by adding one of the
following lines anywhere in the buffer:
#+STARTUP: overview #+STARTUP: content #+STARTUP: showall #+STARTUP: showeverything
Furthermore, any entries with a ‘VISIBILITY’ property (see Properties and columns) will get their visibility adapted accordingly. Allowed values
for this property are
Switch back to the startup visibility of the buffer, i.e., whatever is requested by startup options and ‘VISIBILITY’ properties in individual entries.